I think it’s one of the, if not the most intense scenes in the film in terms of Pennywise and another actor, because it’s so in his face.
It (1990) is a TV miniseries. Pennywise the Dancing Clown (Tim Curry) & George "Georgie" Denbrough (Tony Dakota). Pennywise: "Hi ya, Georgie! Aren't you gonna say 'hello'?" Georgie shakes his head. Pennywise: "Oh, come on, bucko. Don't you want a balloon" Pennywise holds up a yellow balloon. Georgie: "I'm not supposed to take stuff from strangers. My dad said so." Pennywise: "Very wise of your dad, Georgie. Very wise, indeed. I, Georgie, am Pennywise, the Dancing Clown. You are Georgie."